Littlechef

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* NEW: Show what cookbooks are being uploaded to a node
* NEW: deploy_chef now accepts two arguments: "gems" and "ask".
They can be set to "yes" or "no". Default is "no" and "yes", respectively.
This allows deploy_chef to run in non-interactive mode when using it from
another Python program.

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* HOTFIX: fixed a deploy_chef error when calling the gem+rpm installation method
* Some Pylint compliance fixes

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* NEW: Automatic distro detection for deploy_chef
* NEW: Option to install Chef Solo with gems
* NEW: littlechef.py can now be used as a library
* FIX: CentOS installation

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* NEW: command "list_roles"
* NEW: show node attributes in list_nodes
* NEW: Indent node configuration files when saving
* FIX: Add JSON syntax error handling

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* FIXED different PyPI installation issues
* Improved README, code comments and error messages

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* NEW query: cook list_recipes
* OPTIMIZATION: only configured cookbooks and its dependencies are uploaded to nodes
* Output and error checking improvements
* FIX: "subrecipes" are now supported
* FIX: roles now really work